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CN-116321527-B - Methods, devices, and systems for power efficient D2D communication for wearable and IOT devices

CN116321527BCN 116321527 BCN116321527 BCN 116321527BCN-116321527-B

Abstract

Methods, devices and systems for establishing and conducting device-to-device communication in a radio network.

Inventors

  • Saad Ahmed
  • Martino M. Freund Radar

Assignees

  • 交互数字专利控股公司

Dates

Publication Date
20260512
Application Date
20170802
Priority Date
20160810

Claims (15)

  1. 1. A method implemented by a first wireless transmit/receive unit (WTRU), the method comprising: Establishing a device-to-device (D2D) communication link between the first WTRU and a second WTRU, wherein the first WTRU acts as a relay to a network for the second WTRU; Receiving a first D2D message from the second WTRU, the first D2D message comprising a non-access stratum (NAS) message; Forwarding a message to the network based on receiving the first D2D message, the forwarded message including a NAS message from the second WTRU; Receiving a response message from the network in response to the message forwarded based on the first D2D message, and Based on receiving the response message from the network, a second D2D message is transmitted to the second WTRU, the second D2D message indicating response information related to the first D2D message.
  2. 2. The method of claim 1, wherein the response message is related to a Tracking Area Update (TAU) message.
  3. 3. The method of claim 2, wherein the response message is based on an out-of-coverage rejection of the TAU request.
  4. 4. The method of claim 3 wherein the second D2D message indicates that the second WTRU is to be reconnected to the network.
  5. 5. The method of claim 1, wherein the first D2D message and the second D2D message correspond to respective PC5 messages.
  6. 6. The method of claim 1, wherein the first D2D message and the second D2D message correspond to respective side link messages.
  7. 7. The method of claim 1 further comprising performing a D2D WTRU discovery procedure to discover the second WTRU.
  8. 8. The method of claim 1 wherein the message sent to the network includes an identification of the second WTRU.
  9. 9. A first wireless transmit/receive unit (WTRU) comprising a processor and a memory configured to: establishing a device-to-device (D2D) communication link between the first WTRU and a second WTRU, wherein the first WTRU is configured to act as a relay to a network for the second WTRU; Receiving a first D2D message from the second WTRU, the first D2D message comprising a non-access stratum (NAS) message; forwarding a message to the network based on receiving the first D2D message, the forwarded message including a NAS message from the second WTRU; receiving a response message from the network in response to the forwarded message based on the first D2D message, and Based on receiving the response message from the network, a second D2D message is transmitted to the second WTRU, the second D2D message indicating response information related to the first D2D message.
  10. 10. The first WTRU of claim 9, wherein the response message is related to a Tracking Area Update (TAU) message.
  11. 11. The first WTRU of claim 10, wherein the response message is an out-of-coverage reject message and wherein the second D2D message indicates that the second WTRU is to reconnect to the network.
  12. 12. The first WTRU of claim 9, wherein the first D2D message and the second D2D message correspond to respective PC5 messages.
  13. 13. The first WTRU of claim 9, wherein the first D2D message and the second D2D message correspond to respective side link messages.
  14. 14. The first WTRU of claim 9 further comprising performing a D2D WTRU discovery procedure to discover the second WTRU.
  15. 15. The first WTRU of claim 9, wherein the message sent to the network includes an identity of the second WTRU.

Description

Methods, devices, and systems for power efficient D2D communication for wearable and IOT devices The present application is a divisional application of chinese patent application No.201780058225.4 entitled "method, apparatus and system for power efficient D2D communication of wearable and IOT devices" filed on 8/2/2017, the contents of which are incorporated herein by reference. Technical Field The present invention relates to the field of wireless communications, and more particularly, to a method, apparatus, and system for enabling device-to-device (D2D) communications in a wireless communication network. Background As major standardization bodies such as IEEE and 3GPP have been defined or are defining specifications supporting device-to-device (D2D) communication, D2D communication has recently received much attention. In the case of 3GPP and LTE based radio access, support for D2D communications is being introduced to allow cost effective and high performance public safety communications using LTE technology. This is primarily due to the desire to coordinate radio access technologies across jurisdictions to reduce capital expenditure and operating costs of radio access technologies available for Public Safety (PS) type applications. Another important motivation is that LTE is a scalable broadband wireless solution that can effectively multiplex different service types such as voice and video. Since Public Safety (PS) applications typically require radio communication in areas that are not within radio coverage of an LTE network (e.g., after a tunnel, deep basement, or catastrophic system outage), D2D communication needs to be supported for PS without any operating network or before the arrival of an ad hoc deployed radio infrastructure. However, PS communications generally still require higher reliability than commercial services, even if operated in the presence of an operating network infrastructure. PS-type applications (e.g., PS-type applications between first responders) are likely to include push-to-talk (push-to-talk) voice services using multiple talk groups. In addition, in order to effectively utilize the capabilities provided by LTE broadband radio, PS-type applications may include services such as video push or download. It is expected that D2D communication will be available not only for PS type applications, but also for commercial use once deployment is completed. One example may be the case for utility companies, which also typically need to support two-way radio communications in areas not covered by the network infrastructure. Further, D2D services such as Discovery (Discovery) are suitable signaling mechanisms to allow proximity-based services and traffic offloading by using LTE-based radio access in commercial use cases. Drawings A more detailed understanding can be obtained from the following detailed description, given by way of example in connection with the accompanying drawings. Similar to the detailed description, the drawings in these figures are examples. The drawings and detailed description are, therefore, not to be regarded as limiting, and other equally effective examples are possible. Furthermore, like reference numerals in the drawings denote like elements, and wherein: FIG. 1A is a system diagram illustrating an example communication system in which one or more disclosed embodiments may be implemented; fig. 1B is a system diagram illustrating an example wireless transmit/receive unit (WTRU) that may be used within the communication system shown in fig. 1A, in accordance with one embodiment; fig. 1C is a system diagram illustrating an example radio access network and another example core network that may be used within the communication system shown in fig. 1A, according to an embodiment; fig. 1D is a system diagram illustrating another example radio access network and another example core network that may be used within the communication system shown in fig. 1A, according to an embodiment; fig. 1E is a system diagram illustrating yet another example radio access network and yet another example core network that may be used within the communication system shown in fig. 1A in accordance with an embodiment; Fig. 2 is a block diagram illustrating a basic communication architecture of D2D communication in a radio access network. Fig. 3A is a diagram illustrating signal flow for establishing and performing D2D communications in a radio network according to one MME-based relay UE selection example embodiment; fig. 3B is a diagram illustrating signal flow for establishing and performing D2D communications in a radio network according to an exemplary embodiment of relay UE selection based on one remote UE, and FIG. 4 illustrates a NAS message structure according to an example embodiment. Detailed Description The detailed description of the illustrative embodiments may now be described with reference to the accompanying drawings. However, while the present invention may be descr